Add alpha argument to glResizeCHROMIUM

This lets the compositor specify whether the backbuffer will need to be blended with the contents behind it, and if not it can use a method that uses less power.

BUG=561185
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1474873003

Cr-Commit-Position: refs/heads/master@{#362817}

1 files changed, 7 insertions, 5 deletions

diff --git a/gpu/command_buffer/client/gles2_implementation.cc b/gpu/command_buffer/client/gles2_implementation.cc
index 208a08b..9b52768 100644
--- a/gpu/command_buffer/client/gles2_implementation.cc
+++ b/gpu/command_buffer/client/gles2_implementation.cc
@@ -4692,12 +4692,14 @@ void GLES2Implementation::UnmapTexSubImage2DCHROMIUM(const void* mem) {
   CheckGLError();
 }
 
-void GLES2Implementation::ResizeCHROMIUM(GLuint width, GLuint height,
-                                         float scale_factor) {
+void GLES2Implementation::ResizeCHROMIUM(GLuint width,
+                                         GLuint height,
+                                         float scale_factor,
+                                         GLboolean alpha) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
-  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glResizeCHROMIUM("
-                 << width << ", " << height << ", " << scale_factor << ")");
-  helper_->ResizeCHROMIUM(width, height, scale_factor);
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glResizeCHROMIUM(" << width << ", "
+                     << height << ", " << scale_factor << ", " << alpha << ")");
+  helper_->ResizeCHROMIUM(width, height, scale_factor, alpha);
   CheckGLError();
 }